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onion
Table of Contents
References & Edit History Quick Facts & Related Topics
Images & Videos
yellow onions and red onions
Why do onions make you cry?
yellow onions yellow onions, white onions, and red onions onion shallot nucleus
How to caramelize onions quickly using chemistry
For Students
onion
onion summary
Quizzes
Ceviche. Peruvian ceviche (sebiche). Raw seafood dish with lime, cilantro, peppers, plantains. Cuisine, food
A World of Food Quiz
Chef tossing vegetables in a frying pan over a burner (skillet, food).
What’s on the Menu? Vocabulary Quiz
Red and yellow cherry tomatoes, some forming a question mark, against a light blue background. (organic, fruits, vegetables)
Fruit or Vegetable? A Quiz
Grains and spices in bags, India. (Indian, vendor, market, food)
Ultimate Foodie Quiz
Venus's-flytrap. Venus's-flytrap (Dionaea muscipula) one of the best known of the meat-eating plants. Carnivorous plant, Venus flytrap, Venus fly trap
Plants: From Cute to Carnivorous
Related Questions
Read Next
Women cutting and onion, cooking, vegetables
Why Do Onions Make You Cry?
Plant seedlings emerging from rich fertile soil
Do Plants Feel Pain?
Flower bingo
Britannica’s Flower Bingo
Food. Pizza. Basil. Tomato.
Why Is Pizza So Popular in the U.S.?
Red tulip among yellow tulips, Mount Vernon, Washington.
Tulip Mania: How a Plant Virus Fueled a Speculative Frenzy
Discover
Hemp (Cannabis sativa).
9 Mind-Altering Plants
Ruminant. Deer. Red deer. Cervus elaphus. Buck. Stag. Antlers.
9 of the World’s Deadliest Mammals
Space race (1957-1969) infographic between United States (U.S.) and Russia. America, Soviet Union, U.S.S.R., space exploration
Timeline of the Space Race, 1957–69
Amendments 1-10 to the Constitution of the United States constitute what is known as the Bill of Rights on an American flag.
What Is the Emoluments Clause?
After a perfect launch, spectators try to catch a last glimpse of Space Shuttle Columbia, barely visible at the top end of the twisted column of smoke.
7 Accidents and Disasters in Spaceflight History
The Colosseum, Rome, Italy. Giant amphitheatre built in Rome under the Flavian emperors. (ancient architecture; architectural ruins)
New Seven Wonders of the World
Aphrodite. Greek mythology. Sculpture. Aphrodite is the Greek goddess of love and beauty.
12 Greek Gods and Goddesses

onion: Media

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Videos

Why do onions make you cry?
Learn why chopping raw onions causes eyes to burn and release tears.
Video: © American Chemical Society (A Britannica Publishing Partner)
How to caramelize onions quickly using chemistry
Using chemistry to caramelize onions faster: adding a pinch of baking soda to speed...
Video: © American Chemical Society (A Britannica Publishing Partner)

Images

yellow onions and red onions
Yellow onions (left) and red onions (Allium cepa).
© rysp/Fotolia
yellow onions
Yellow onions (Allium cepa) for sale.
AdstockRF
yellow onions, white onions, and red onions
Onion bulbs (Allium cepa) in a variety of shapes, colours, and sizes.
© Thodonal/Dreamstime.com
onion
Onions (Allium cepa).
Walter Chandoha
shallot
Shallot (Allium).
© MassanPH—Moment/Getty Images
nucleus
The nucleus of each of these onion cells, highlighted in dark purple, controls the...
© Ed Reschke—Stone/Getty Images
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